Abbreviated as HCA, Host Channel Adapter
is a network
fabric interconnect based on InfiniBand
technology (which provides the specification for the transmission of data between processors
devices). It provides a computer
connection to other InfiniBand devices. That port can be connected to another HCA, a target device, or an InfiniBand switch fabric that redirects the data coming in on one of its ports out to a device attached to another of its ports.